Nouns denoting natural phenomena

overpressure
a transient air pressure greater than the surrounding atmospheric pressure
 
focus
a point of convergence of light (or other radiation) or a point from which it diverges
 
mock sun
a bright spot on the parhelic circle; caused by diffraction by ice crystals
 
pleochroism
the phenomenon of different colors appearing when certain crystals are viewed from different directions
 
luck
an unknown and unpredictable phenomenon that causes an event to result one way rather than another
 
chop
the irregular motion of waves (usually caused by wind blowing in a direction opposite to the tide)
 
efflorescence
a powdery deposit on a surface
 
brisance
the shattering or crushing effect of a sudden release of energy as in an explosion
 
ionospheric wave
a sky wave that is reflected by the ionosphere
 
spillover
(economics) any indirect effect of public expenditure
 
motion
an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object
 
heat wave
a wave of unusually hot weather
 
systemic circulation
circulation that supplies blood to all the body except to the lungs
 
thermionic current
an electric current produced between two electrodes as a result of electrons emitted by thermionic emission
 
valency
the phenomenon of forming chemical bonds
 
thunderstorm
a storm resulting from strong rising air currents; heavy rain or hail along with thunder and lightning
 
load
the power output of a generator or power plant
 
angular velocity
(physics) the rate of change of the angular position of a rotating body; usually expressed in radians per second or radians per minute
 
pogonip
a dense winter fog containing ice particles
 
mass deficiency
the amount by which the mass of an atomic nucleus is less than the sum of the masses of its constituent particles
 
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